Warp stop motion



I w. H. BAKER WARP STOPlM OTION Filed Jan. 28, 1924 2 Sheets-Sheet 1 3g 40 Ar an/or lVf/l/am H. Baker Jan, 29, 1929.

w. H. BAKER WARP STOP MOTION Filed Jan. 28, 1924, 2 Sheets-Sheet 2 knew/or lVf/l/am li Baker 87 I lfatented Jane 29, 1939.

WILLIAM H. BAKER, or Mon'rnnnn arisen-o, CANADA.

' WARP 's ror MOTION.

' Application filed January 28, 1924. Serial No. 689,126.

This invention relates to improvements in warp stop motions for looms, and the primary object of the invention is to provide the loom upon breakage of any warp thread.

A still further object is to provide manually operable releasing means for slide bars, whereby the same may be manually moved after the loom has been stopped. owing to warp breakage to facilitate location of the broken thread or threads.

Various other objects and advantages may be ascertained from the following description and from the accompanying drawings.

The embodiment of the invention herein described and illustrated presents at one end of the warp stop motion devices a vibrating element or bar driver embodying a pair of entirely separate elements loosely mounted upon a rock shaft and normally connected together by means of a manually operable pin. One of the vibrator elements has operating connection with the slide bars and the other member engages between spring fingers fixedly mounted on the rock shaft in the usual way and for the usual purpose. This last mentioned vibrator element is connected to a stirrup supporting one end of a knock-off rod, so that when the vibrator is in operation the stirrup will be reciprocated and the knockoff rod oscillated across the path of an oscillating feeler driven from a cam on the crank shaft or other suitable element of the loom. During the normal operation of the loom the oscillating feeler and oscillating knock-off rod pass each other without touching but in the event of. warp breakage with consequent stoppage of the vibrator, the feeler will strike the knock-off rod and cause stoppage of the loom. The two parts of the vibrator may be separated regardless of whether the loom is in operation or not to enable manual operation of the slide bars as may be de sired. Preferably'aspecial form of, feeler cam is provided which may be slipped on the crank shaft and adjusted to any suitable position thereon.

In the accompanying drawings which illustrate one embodiment of the invention l is a vertical cross section of a loom illustrating the; connection of the warp stop Fig. 7 is a fragmentary perspective view showing the engagement of the guide bars and holding strip.

Referring more particularly to the drawings, l1 designates the frame of a loom, 12

the main shaft, 13 the crank shaft and 14 the shipper handle. in Figure 1 the warp stop motion is designated as a whole by the numoral 15 and is mounted in the usual location for such mechanisms. An eXcent-ric 16 or other suitable device is mounted on the main shaft 12 and is connected by a rod 17 with the stop motion. A knock-0E rod'18 leads from the shipper handle to the stop motion. A feeler cam 19 is mounted on the crank shaft to operate a lever 20 carried by the stop motion. This cam may be of any suitable arrangement but a cam of the form shown in Figure 5 has bee-n found particularly satisfactory as it is in one pieceand may be attached at any point on the crank shaft and adjusted as desired. The cam proper, designated 19, springs laterally and radially from all-shaped hub 21, the opening 22 of which is of a size to receive the crank shaft and is moreover disposed diameterically opposite the cam. A. pair of set screws 23 pass throughthe hub at an obtuse angle to the radial centre line of the cam so that when tightened they will draw the bottom of the hub opening closely against the shaft, as will be readily seen from Figure 5. When in operation the screws are under substantially no load as the cam proper is in compression between the shaft and the lever 20. The maximum width of the cam is preferably the same as the diameter of the shaft, so that the cam is for all intents and purposes merely a radial projection from the shaft, upon which latter the lever 20 bears when the cam is out of engagementwith the lever. The cam is disposed to one side of the hub in order that the set screws may be clear of the lever20.

' The stop n'iotion is supported primarily by a pair of end frames or stirrup bars 24 and 25, each provided with an apertured lug 26 for engagement with suitable supporting brackets. The stirrup bars are rigidly connected by a warp supporting rod 27 securely bolted to lugs 28 springing from the stirrup bars. This supporting rod 27 is disposed at the front of the stop motion and extends as usual from side to side of the loom. The rod is preferably flat as shown. A second warp support rod 29 is provided as usual at the back of the stop motion and is supported by brackets 30 slidably mounted on the support rod 27. These brackets have slots which receive the flat supporting red, as clearly shown in Figure 4, and are prevented from swinging either up or down by the shape of the supporting rod. Set screws 31 are provided to secure the brackets at suit-able points in the length of the rod 27. The rear end of each bracket presents an upwardly opening hook 32 to support the rod 29. At suitable points in the length of the brackets any desired number of upwardly opening sockets 33 are provided to receive brace rods 34. A holder strip 35 Figs. 3, 4, 7, is connected to the stirrup bar 25 and is provided in its upper edge with notches 35 Fig. 7, to receive and'space the guide bars for the dropwires 361, Figs. 2 and 8. The guide bars 36 are supported at one end in the usual manner in the stirrup bar 24 and at their other ends are notched in their lower edges, as usual, for engagement with the holding strip 35. The stirrup bar 25 is so shaped that th uide bars do not touch the same but are supported, spaced' and held against longitudinal movement entirely by the holder strip 35, as shown in Figure 7. Resiliently mounted keepers 37 re tain the guide bars on the stirrup bars and permit of the easy removal of the guide bars and slide bars 38 therein.

centre brace 39 is provided, being preferably a sheet of material such as indurated iibre. This centre brace is provided with upwardly openingnotches 40 to receive the front and back warp supporting rods. The brace is also provided with upwardly opening notches 41 to receive the guide bars and with apertures 42 for passage of the brace rods. The front end of the centre brace is connected by any suitable means to a bracket 43 adjustably' mounted on the front warp supporting rod 27. Preferably the bracket presents a lug 44 extending across the frontedge of the centre brace so as to hold the lat-- ter against oscillatory movement relatively to the bracket in a vertical plane. The mounting of the bracket is preferably effected by means of a cap screw 45 passing through a slot 46 in the bracket and into the rod 27 This centre brace may be adjusted along the support red. It may be very readily removed ina downward direction, together with the brace rods which. pass of such connection being herein omitted.

One edge of the driver carries a pair of spaced tongues or lugs 51, Figs. 3 and 4. An arm 52 is fixedly connected to the rock shaft in spaced relation to the lugged edge of the driver and an intermediate arm 53 is loosely mounted on the rock shaft between the arm 52 and the driver 50. This arm 53 is provided with a portion 54 to project under the lower lug 51 of the driver, the said portion being apertured to receive the end of a pin 55 freely slidable in the lugs 51 and retained against loss by a cotter or the like 56 passed through the pin between the lugs. The arm 53 is further provided with a projection 57 overhanging the arm 52. Springs 58 are connected to opposite sides of the arm 52 at their lower ends and at their upper ends embrace between them the projection 57 so as to form a yielding driving connection between the arms 52 and 53 forthe well known purpose. By raising the pin 55 so as to disengage it from the arm 54, the operator may disconnect the driver 50 from the composite driving mechanism embodying the members 52 and 53 and springs 58. in this way the slide bars may be readily moved when the stop motion is not in operation or may be disengaged from the rock shaft when the stop motion is in operation.

The arm 53 is provided with a downward extension 59 bifurcated at its lower end to embrace a stirrup 60 pivotally connected between the bifurcations. This stirrup 60 is slideably mounted. on a guide bracket or extension 61 of the stirrup bar 25 and when the mechanism is in operation the stirrujj) reciprocates in a direction parallel. to the slide bars. The knock-oft" rod 18, which is disposed approximately at right angles to the line of stirrup movement, rests in the stirrup and will be thereby oscillated transversely of its length. The stirrup bar 25' is provided with a downwardly projecting bracket 62 in which is journalled a rock shaft 63. One end of this rock shaft has fixedly connected thereto the arm 20. The opposite end of the rock shaft has rigidly connected thereto an arm 64 adapated to oscillate in the path of the oscillating knock-0d red. A spring 65 is connected between the foot of the arm 64 and any suitable fixed point to hold the lever 20 down on the cam 19 and striking one another.

shaft 13. The relative speeds of oscillation of the knock-off rod and feeler arm ti l are such, that during the normal operation of the stop mechanism the two members will move in their intersecting paths without If, however, breakage of a warp thread causes stoppage of any slide bar and consequent .stoppageof the arm 53 which oscillates the knock-off rod, the knock-off rod will come to rest at approximately mid-stroke; that is, approximately half-way between the two positionsshown in Figure '6 and in. the plane of the feeler arm. The feeler arm will then strike the knock-off rod and operate the same to move the shipper handle 14 and stop the loom. The form of knock-off rod shown in l igure 3 is that adapted for operation to pull off the shipper lever and the rod is therefore provided with an end hook or lug 66 for engagement by the feeler arm. It will be understood, however, that the adjustment may be such that the feeler will strike the end of the rod and push the same to operate the shipper lever.

The construction described presents many advantages both in operation and manufacture. The pin connection between the bar driver and rock shaft enables the bars to be released during stoppage ofthe loom to la cilitate location and release of fallen'drop Wires and also enables the driver to be dis-- connected while the loom is running. The driving connection of the bar driver automatically restores itself when the pin is released by the operator as the top of the part 54 is sufficiently wide to prevent its movement out from under the pin. The stopping means is positive in operation and very compact owing to its direct drive from the crank shaft.

Obviously many modifications may be made without departing from the spirit of the invention. It will therefore be understood that the invention is not confined to the details of the embodiment herein illustrated and described but contemplates all such variations and substitutions as fall within the scope of the appended claims.

Having thus described my invention, what I claim is 2- 1, In a loom, a warp stop motion including a vibrating device, a shipper lever, a knockoff rod connected to the shipper lever, a stirrup toslidably support and oscillate the knock-0H rod connected to reecive reciproeating movement from the vibrating device, a feeler independent of the loom lay to oscillate in a path intersectin the path of the knockoff rod and adapte on occasion to impart longitudinal movement to the knockoff rod.

2. In a loom, a warp stop motion including guide bars, slide bars in the guide bars, drop wires threaded on the guides and slides, and a vibrating bar driver having yielding driving connection, a shipper lever, a knockoff rod connected between the driver and lover to receive oscillatory motion therefrom, a feeler'to oscillate in'a path'intersecting the path of the knock-off rod to impart longitudinal movement to the rod upon stoppage of rod oscillation by fall of a drop wire.

In a loom, a main shaft, a crank shaft, a shipper lever, a knock-0E rod connected to the lever, and a warp stop motion including a vibrating device receiving motion from the main shaft and connected to the knockoil"; red to oscillate the same, a feeler to oscillate in a path intersecting the path of the knock-off rod, a cam on the crank shaft and an arm engaging said cam to operate the feeler and upon occasion to impart longitudinal movement to the knock-off rod.

4. In a warp stop motion, a rock shaft, actuating means therefor, a bar ing two i'nembers each loosely mounted on the shaft, yielding driving means between the shaft and one of said members and a separable driving connection betweensaid members.

5. In a warp stop motion, the combination with slide bars, of a rock shaft, actuating means therefor, a bar driver including two members loosely mounted on the shaft, one only of said members having connection with the slide bars, a yielding driving connection i between the shaft and the other of said members, and a pin forming a severable connection between the members,

6. In a warp stop motion, notchedguide bars, notched slide reciprocable therein, drop wires threaded on said bars and adapted to arrest relative movement thereof, upon warp failure, driving means for the slide bars including a member connected to the bars and, a second member having connection with a source of power and a manually releasable connection between said members to enable free operation of the bars for detection and release of fallen drop wires.

7. In a warp stop motion, a slide bar driver including a pair of members, one connected to the bars and the other to a source of power, and a manually movable pin forming a connection between the members disposed vertically and adapted to be operated by gravity to connect and normally maintain connection between the members.

8. In a loom, a shipper lever, a knock-off rod connected thereto, a warp stop motion including an oscillating bar driver comprising a part to be connected to slide bars and a part connected with said knockoff rod, yielding means for driving both of said parts through the second part, releasable driving connection between the parts and a feeler to oscillate across the path of the knock-off rod.

9. In a warp stop motion, arock shaft, a bar driver loosely mounted thereon, a lever loosely mounted on the shaft beside the driver, spring fingers secured to the shaft and e1ndriver includif.

lllil bracing one end of the lever to impart oscillati115; movement thereto, a pin slidably mounted in the driver and engaging in the lever to releasably connect the driver and lever, and a knock-rod support at the other end of the lever.

10. In a Warp stop motion, a stirrup bar, a rock shaft journalled thereon, a pair of oscillatable members loosely mounted on the shaft, one of said members serving as a bar driver, yielding'driving connection between theshaft and second member, a pin slidably mounted in one of said members and engaging in the other member to operatively connect the members, a bracket on the stirrup bar, and a knock-off rod support slidably mounted on said bracket and connected with said second member for It nfiocation.

11. In a Warp stop motion, a stirrup bar, a rock shaft journalled thereon, a pair of oscillatable members loosely mounted on the shaft, one of said members serving as a bar driver, yielding driving connection between the shaft and second member, a pin slidably mounted in one of said members and engaging in the the other member to operatively connect the members, a bracket on the stirrup bar, and a knock-off rod support slidably mounted. on said bracket and connected. With said second member for reciprocation, and a feeler to oscillate in a path intersecting the path of a knock-off rod on said support and to engage said rod upon stoppage of the bar driver between the extremes of its movement.

12. In a loom, a crank shaft, a shipper lever, a knock-off rod connected to the lever,

and a Warp stop motion including means to oscillate the knock-off rod, and also including thereof.

13. In a loom, a crank shaft, a stopping mechanism including a knockoff rod, a feeler independent of the loom lay device directly operated by the crank shaft, a Warp controlled means for positioning the knock-off rod in the path of the feeler upon Warp failure.

14?. In a. loom, a crank shaft, a stopping mechanism including a lmoch-otf rod, and a feeler separate and remote from the loom lay, means to normally oscillate the rod and feeler in intersecting); paths but Without engage ment, the said means being in the case of the feeler a direct driving connection from the crank shaft, and warp controlled means for interrupting the movement of the knock-off rod upon warp failure to position the knockoff rod in the path of the feeler. i

15. In a loom, a stopping mechanism including a knock-off rod, a crank shaft operated fcclcr independent of the loom lay and means for maintaining the knock-off rod normally out of contact With the feeler and for positioning the knock-0E rod in the path of the feeler upon Warp failure, for direct operation by the feeler.

In Witness whereof, I have hereunto set my hand.

IVILLIAM I-I. BAKER. 

